I need to download solid works for my study purpose...there are websites which offers free downloads of solid works...but as i do not trust these websites, i did not try to download free from unknown websites...so, i tried to get a free student version from solid work's own website...but after i created an account, i could not get access to all the facilities...they told me to register products....so i clicked on the "register my products" option and what they want me to provide is a serial number of the product i want to register...so where do i get a serial number of solid work 2015 or any other version of 3d drawing software???Can anyone provide me with the right information??I will be thankful..